"Some states that expanded Medicaid under the Affordable Care Act and set up all or part of their own insurance exchanges have seen a marked drop in the number of uninsured adults.
The uninsured rates in states that opted to expand Medicaid, a health program primarily for low-income residents, and set up their own exchanges declined more in the first half of 2014 than in the states that didn’t take that approach, according to a study released Tuesday by Gallup. The survey was based on a random sample of adults through June 30.
Arkansas saw the percentage of uninsured drop from 22.5% in 2013 to 12.4% through midyear 2014, according to the survey. Kentucky followed, with its percentage of uninsured dropping from 20.4% to 11.9% during the same time span.
The other states with the largest drop in the percentage of uninsured were Delaware, Washington, Colorado, West Virginia, Oregon, California, New Mexico and Connecticut."